Quantum Coupling Effect between Quantum Dot and Quantum Well in a Resonant Tunneling Photon-Number-Resolving Detector
WENG Qian-Chun1, AN Zheng-Hua2,3**, XIONG Da-Yuan1, ZHU Zi-Qiang1
1Key Laboratory of Polar Materials and Devices (Ministry of Education), East China Normal University, Shanghai 200241 2State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai 200433 3Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433
Abstract：Excited states of InAs quantum dots (QDs) can be energetically coupled with the confined level of GaAs quantum wells (QWs) in a thin-barrier resonant tunneling diode (RTD). Single charge variation in the coupled QD can effectively switch on/off the resonant tunneling current passing through RTD, not only for efficient single-photon detection but also for photon-number-resolving detection. We present the study of the QD–QW coupling effect in the quantum dot coupled resonant tunneling diode (QD-cRTD) and figure out important factors for further improving the detector performance.
2015, Vol. 32 
